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12 Troubleshooting
FAULT
Burner does not light
No ignition
Motor does not run
Pump does not deliver oil
Incorrect burning
Loud noises from pump
Irregular atomising
No oil-flow
Oil flows out as soon as burner
starts up
Smell of gas
Smell of oil
Circulation pump does not run or
cuts off
CO
value too low
2
Flue gas temperature too high
Flue gas temperature too low
CAUSE
Burner safety cut-off button or burner relays
disconnected.
Short-circuited ignition electrodes
Ignition electrode gap too wide
Dirty or wet ignition electrodes
Ignition cable charred
Flame detector (photoresistor) soiled or
faulty
Blown insulator or ignition electrode
Faulty ignition transformer
Faulty automatic firing system
Faulty condenser
Oil pump dirty or seized
Seized bearing
Faulty motor
Damaged drive
Suction valve leaking or seized
Suction tube leaking
Air in suction tube
Filter dirty and clogged
Filter leaking
Atomising pressure too low
Pump is sucking in air, vacuum in suction
tube too high
Jet nozzle partially blocked
Nozzle worn out from over-use
Filter soiled
Jet hole blocked
Leaking magnetic oil pump valve (or
possibly dirty)
Leaking tubes, armatures or burners
Leaking tubes, armatures or burners
Loose cable clamp or bridge
Faulty condenser
Air intake incorrectly set
Leaking flue pipe
Dirty boiler
Air intake incorrectly set
Chimney draught too strong
Burner capacity too low or burner too small
REMEDY
Push safety cut-off button. If burner does
not work properly after several attempts, call
service engineer immediately
Adjust
Adjust
Clean
Determine cause and remove, Change
ignition cable
Clean if soiled,
replace if faulty
Replace
Replace
Replace
Replace
Clean or replace
Replace motor
Replace motor
Replace
Clean or replace
Retighten screw connector
Bleed at pump
Clean
Replace
Increase pump pressure setting
Tighten screw connector. Check tube for
cuts.
Replace jet
Replace
Clean
Replace jet
Clean or replace
Shut off gas taps at meter and at connection
to device. Contact customer service or gas
supply company immediately.
Check units for leaks. Repair leaking
sections or contact specialist repair firm.
Tighten all clamp screws
Replace
Check combustion chamber settings
Seal flue pipe
Clean
See above
Have draught interrupter installed
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